| Records |
Author  |
Henson, S.M.; Dennis, B.; Hayward, J.L.; Cushing, J.M.; Galusha, J.G. |
| Title |
Predicting the dynamics of animal behaviour in field populations |
Type |
Journal Article |
| Year |
2007 |
Publication |
Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
| Volume |
74 |
Issue |
1 |
Pages |
103-110 |
| Keywords |
colony occupancy; differential equation; dynamic modelling; glaucous-winged gull; habitat ecology; Larus glaucescens; mathematical modelling; sleep; territory attendance |
| Abstract |
Many species show considerable variation in behaviour among individuals. We show that some behaviours are largely deterministic and predictable with mathematical models. We propose a general differential equation model of behaviour in field populations and use the methodology to explain and predict the dynamics of sleep and colony attendance in seabirds as a function of environmental factors. Our model explained over half the variability in the data to which it was fitted, and it predicted the dynamics of an independent data set. Differential equation models may provide new approaches to the study of behaviour in animals and humans. |
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Equine Behaviour @ team @ |
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4206 |
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Henzi, S.P.; Lycett, J.E.; Weingrill, T. |
| Title |
Mate guarding and risk assessment by male mountain baboons during inter-troop encounters |
Type |
Journal Article |
| Year |
1998 |
Publication |
Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
| Volume |
55 |
Issue |
6 |
Pages |
1421-1428 |
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| Abstract |
Aggressive herding of females is a frequent but not invariant response by male savannah baboons,Papio cynocephalus, to encounters with other troops. While males in some troops are consistently more likely to herd than those in others, not all inter-troop encounters result in herding, even within particular troops. This suggests that males assess the risk of male invasion posed by each encounter and respond accordingly. We used data from baboon troops in the Drakensberg mountains to determine the rules males follow in deciding whether to herd. Consistent differences between troops were explained only by the adult sex ratio. Males were more likely to herd if the sex ratio of their own troop was female biased, a finding that is concordant with the observation that males are more likely to immigrate into troops where the sex ratio is more female biased than the population average. Differences within troops were a consequence only of encounter distance, with herding being more likely at closer distances. We found a negative correlation between the angle of approach to the other troop and the subsequent angle of deflection. We interpret this to mean that herding functions to increase the distance between the interacting troops, thereby curtailing opportunities for strange males to inspect the troop and determine its sex ratio. In this way, possibly unlike those in other populations, the decision rules of these male baboons are geared to protecting longer-term reproductive prospects. |
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0003-3472 |
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Equine Behaviour @ team @ |
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5311 |
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| Author |
Herbert Gintis; Samuel Bowles; Robert Boyd; Ernst Fehr |
| Title |
Explaining altruistic behavior in humans |
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Journal Article |
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2003 |
Publication |
Evolution and Human Behaviour |
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24 |
Issue |
3 |
Pages |
153-172 |
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Altruism; Reciprocity; Experimental games; Evolution of cooperation |
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Recent experimental research has revealed forms of human behavior involving interaction among unrelated individuals that have proven difficult to explain in terms of kin or reciprocal altruism. One such trait, strong reciprocity is a predisposition to cooperate with others and to punish those who violate the norms of cooperation, at personal cost, even when it is implausible to expect that these costs will be repaid. We present evidence supporting strong reciprocity as a schema for predicting and understanding altruism in humans. We show that under conditions plausibly characteristic of the early stages of human evolution, a small number of strong reciprocators could invade a population of self-regarding types, and strong reciprocity is an evolutionary stable strategy. Although most of the evidence we report is based on behavioral experiments, the same behaviors are regularly described in everyday life, for example, in wage setting by firms, tax compliance, and cooperation in the protection of local environmental public goods. |
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1090-5138 |
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Equine Behaviour @ team @ S1090-5138(02)00157-5 |
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4943 |
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Hewitt, S.E.; Macdonald, D.W.; Dugdale, H.L. |
| Title |
Context-dependent linear dominance hierarchies in social groups of European badgers, Meles meles |
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Journal Article |
| Year |
2009 |
Publication |
Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
| Volume |
77 |
Issue |
1 |
Pages |
161-169 |
| Keywords |
David's score; directed aggression; dominance rank; European badger; grooming behaviour; linear dominance hierarchy; Meles meles; reproductive success; relatedness; social status |
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A social hierarchy is generally assumed to exist in those mammalian societies in which the costs and benefits of group living are distributed unevenly among group members. We analysed infrared closed-circuit television footage, collected over 3 years in Wytham Woods, Oxfordshire, to test whether social groups of European badgers have dominance hierarchies. Analysis of directed aggression between dyads revealed linear dominance hierarchies in three social-group-years, but patterns within social groups were not consistent across years. Dominance hierarchies were significantly steeper than random in five out of six social-group-years. In those social-group-years where a linear hierarchy was determined, there was an effect of sex on dominance rank, with females gaining significantly higher rank than males in two social-group-years. Overall, rank was not related to age, nor did it appear to affect the likelihood of an individual being wounded, or an individual's breeding status. The latter resulted from nonorthogonality between sex and breeding status, as there were only two breeding males. Overall, hierarchies were primarily dominated by breeding females, and may occur when breeding competition arises. Relatedness, unreciprocated allogrooming and sequential allomarking were not consistently related to levels of directed aggression across social-group-years. We suggest that dominance structures within European badger groups may be context dependent, with future study required to complete our understanding of where, and when, they arise. |
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0003-3472 |
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Equine Behaviour @ team @ |
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4695 |
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| Author |
Heyes CM |
| Title |
Self-recognition in primates: irreverence, irrelevance and irony |
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Journal Article |
| Year |
1996 |
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Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
| Volume |
51 |
Issue |
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Pages |
470 |
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Equine Behaviour @ team @ |
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3007 |
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| Author |
Heyes CM |
| Title |
Self-recognition in primates: further reflections create a hall of mirrors |
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1995 |
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Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
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50 |
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1533 |
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Equine Behaviour @ team @ |
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3006 |
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| Author |
Heyes CM |
| Title |
Reflections on self-recognition in primates |
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Journal Article |
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1994 |
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Animal Behaviour. |
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Anim. Behav. |
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47 |
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909 |
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Equine Behaviour @ team @ |
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3005 |
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| Author |
Heyes, C.M. |
| Title |
Imitation and flattery: a reply to Byrne & Tomasello |
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Journal Article |
| Year |
1995 |
Publication |
Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
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50 |
Issue |
5 |
Pages |
1421-1424 |
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refbase @ user @ |
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593 |
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Heyes, C.M. |
| Title |
Imitation, culture and cognition |
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Journal Article |
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1993 |
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Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
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46 |
Issue |
5 |
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999-1010 |
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Abstract. This paper examines the significance of imitation in non-human animals with respect to the phylogenetic origins of culture and cognitive complexity. It is argued that both imitation (learning about behaviour through nonspecific observation) and social learning (learning about the environment through conspecific observation) can mediate social transmission of information, and that neither is likely to play an important role in supporting behavioural traditions or culture. Current evidence suggests that imitation is unlikely to do this because it does not insulate information from modification through individual learning in the retention period between acquisition and re-transmission. Although insignificant in relation to culture, imitation apparently involves complex and little-understood cognitive operations. It is unique in requiring animals spontaneously to equate extrinsic visual input with proprioceptive and/or kinaesthetic feedback from their own actions, but not in requiring or implicating self-consciousness, representation, metarepresentation or a capacity for goal-directed action. |
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Equine Behaviour @ team @ |
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2920 |
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| Author |
Hirata, S. |
| Title |
A note on the responses of chimpanzees (Pan troglodytes) to live self-images on television monitors |
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Journal Article |
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2007 |
Publication |
Behavioural Processes |
Abbreviated Journal |
Behav. Process. |
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75 |
Issue |
1 |
Pages |
85-90 |
| Keywords |
Animals; *Discrimination Learning; Female; Male; Pan troglodytes/*psychology; *Self Concept; Self Psychology; Social Behavior; Television |
| Abstract |
The majority of studies on self-recognition in animals have been conducted using a mirror as the test device; little is known, however, about the responses of non-human primates toward their own images in media other than mirrors. This study provides preliminary data on the reactions of 10 chimpanzees to live self-images projected on two television monitors, each connected to a different video camera. Chimpanzees could see live images of their own faces, which were approximately life-sized, on one monitor. On the other monitor, they could see live images of their whole body, which were approximately one-fifth life-size, viewed diagonally from behind. In addition, several objects were introduced into the test situation. Out of 10 chimpanzees tested, 2 individuals performed self-exploratory behaviors while watching their own images on the monitors. One of these two chimpanzees successively picked up two of the provided objects in front of a monitor, and watched the images of these objects on the monitor. The results indicate that these chimpanzees were able to immediately recognize live images of themselves or objects on the monitors, even though several features of these images differed from those of their previous experience with mirrors. |
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Great Ape Research Institute, Hayashibara Biochemical Laboratories Inc., Okayama, Japan. hirata@gari.be.to |
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English |
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0376-6357 |
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PMID:17324534 |
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Equine Behaviour @ team @ |
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4145 |
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